CN211507198U

CN211507198U - Fire resisting cable of resistance to compression

Info

Publication number: CN211507198U
Application number: CN202020113384.9U
Authority: CN
Inventors: 王涛; 沈道华; 王中红; 卢慰
Original assignee: Wuhan Zhongxin Cable Group Co ltd
Current assignee: Wuhan Zhongxin Cable Group Co ltd
Priority date: 2020-01-17
Filing date: 2020-01-17
Publication date: 2020-09-15
Anticipated expiration: 2030-01-17

Abstract

The utility model belongs to the technical field of the technique of cable production and specifically relates to a fire resisting cable of resistance to compression is related to, including many cable cores, the week side cladding of many cable cores has the inner sheath, week side of inner sheath is overlapped in proper order and is equipped with buffer sleeve and load cover, a plurality of grafting strips of the interior week side interval fixedly connected with of load cover, a plurality of buffering strips of the periphery side interval fixedly connected with of buffer sleeve, the dashpot that is used for grafting strip to peg graft is offered to the buffering strip, the inside wall butt of grafting strip and dashpot, the area that grafting strip is close to the one end of dashpot is greater than the diapire area of dashpot, grafting strip is bellied cambered surface towards the one end of dashpot, the diapire of dashpot has set firmly the resilience arch, the terminal surface that the resilience arch. The utility model discloses utilize buffering strip, resilience arch and connecting strip to the cushioning effect of grafting strip, reduce the pressure that the cable core received, realized the effect that improves the crushing resistance of cable, be favorable to preventing that the cable core from being extruded the fracture.

Description

Fire resisting cable of resistance to compression

Technical Field

The utility model belongs to the technical field of the technique of cable manufacture and specifically relates to a fire resisting cable of resistance to compression is related to.

Background

With the rapid growth of national economy, particularly the pace of rural and urban power grid construction and transformation, the electric power industry of China is rapidly developed; thereby promoting the development of the electrical industry matched with the power industry, in particular the development of the wire and cable industry, and the variety development of the wire and cable shows a diversified trend; the electric wire and cable has been developed from pure power transmission to multi-functionalization, i.e. new characteristics are respectively added according to different purposes, such as: flame retardant cables, fire resistant cables, low halogen low smoke cables, halogen free low smoke cables and the like.

The chinese patent of grant publication number CN209388770U provides a fire-resistant type cable, including protective sheath and four group's conductive core group, conductive core group is arranged and is "field" style of calligraphy in the protective sheath, conductive core group includes a plurality of electrically conductive copper wires, electrically conductive copper wire is through forming conductive core group around package non-woven fabrics parcel, set up the stainless steel armor on the inner wall of protective sheath, be provided with fire-retardant layer on the inner wall of stainless steel armor, be provided with the heat insulation layer on the inner wall of fire-retardant layer, the inner wall of heat insulation layer is provided with the insulating layer.

The fire resistance of the cable is improved through the flame-retardant layer and the heat-insulating layer, but the cable is affected by various external pressures in use, so that the cable core inside the cable is easily extruded and cracked, the service life of the cable core is shortened, and the transmission effect of signals and electric power is affected.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims at providing a fire resisting cable of resistance to compression. The cable core has the advantages of being strong in compression resistance and capable of preventing the cable core from being extruded and cracked.

The above object of the present invention can be achieved by the following technical solutions:

the utility model provides a fire resisting cable of resistance to compression, includes many cable cores, many week side cladding of cable core has the inner sheath, week side of inner sheath is overlapped in proper order and is equipped with cushion collar and load cover, a plurality of grafting strips of the interior periphery side interval fixedly connected with of load cover, a plurality of buffering strips of the periphery side interval fixedly connected with of cushion collar, the buffering strip is offered and is used for the dashpot that grafting strip was pegged graft, grafting strip with the inside wall butt of dashpot, grafting strip is close to the area of the one end of dashpot is greater than the diapire area of dashpot, grafting strip orientation the one end of dashpot is bellied cambered surface, the diapire of dashpot has set firmly the resilience arch, the resilience arch is close to the terminal surface of grafting strip is bellied cambered surface.

Through adopting the above technical scheme, when the load cover received the extrusion, the protruding motion of kick-backing is followed to the inner wall orientation of dashpot to the grafting strip, make the both sides of grafting strip towards the dashpot will cushion a extrusion deformation, the one end of grafting strip towards the dashpot is favorable to reducing the wearing and tearing of grafting strip for bellied cambered surface, when grafting strip butt to the time-out of kick-backing, the arch of kick-backing is compressed, the bellied elastic restoring force of kick-backing is favorable to the restoring to the throne of grafting strip, thereby the pressure that the cable core received has been reduced, the effect of the crushing resistance performance of improvement cable has been realized, prevent that the cable core from being by extrusion fracture, guarantee the transmission effect.

The present invention may be further configured in a preferred embodiment as: adjacent be provided with between the grafting strip in the circumference of cable core realizes the connecting strip of cushioning effect, the connecting strip is the V font, the closed end of connecting strip with buffer sleeve fixed connection, the both sides of connecting strip are equallyd divide respectively with two adjacent buffering strips and grafting strip fixed connection.

Through adopting above-mentioned technical scheme, when the grafting strip was followed the protruding motion of resilience of inner wall orientation of dashpot, the buffering strip all made the connecting strip by extrusion deformation with the grafting strip, was formed with the cavity between connecting strip and buffering strip and the grafting strip, was favorable to the connecting strip to realize the buffering effect to buffering strip and grafting strip.

The present invention may be further configured in a preferred embodiment as: the periphery of bearing cover cladding has the oversheath, the periphery wall of oversheath is equidistant to be set firmly a plurality of buffering archs.

Through adopting above-mentioned technical scheme, when the cable received the extrusion, utilize oversheath and the protruding elastic buffer power of buffering to realize the effect of buffering decompression.

The present invention may be further configured in a preferred embodiment as: the cross-sectional area of the inserting strip is gradually reduced from the bearing sleeve to the buffer strip.

Through adopting above-mentioned technical scheme, the area that the grafting strip is close to the one end of dashpot is greater than the diapire area of dashpot, and the cross sectional area of grafting strip by the load cover towards the dashpot strip reduce gradually for when the grafting strip moves towards the dashpot strip, the inner wall of dashpot is extruded to the grafting strip, makes the dashpot towards both sides take place deformation and extrusion connecting strip.

The present invention may be further configured in a preferred embodiment as: adjacent two be provided with the support bar between the cable core, the cable core is kept away from the week side of inner sheath with the support bar butt, the support bar with inner sheath fixed connection.

Through adopting above-mentioned technical scheme, the inner sheath is fixed in between two adjacent branches of support bar respectively with many cable cores, utilizes the support bar to make four cable cores mutually independent and rigidity, and inner sheath and support bar all have the insulating effect of fire prevention, are favorable to improving the fire resistance of single cable core.

The present invention may be further configured in a preferred embodiment as: and an anti-combustion layer is wound between the outer sheath and the bearing sleeve.

By adopting the technical scheme, the fire-resistant layer is made of the ceramic silicon rubber material, so that the fire resistance of the cable is improved.

The present invention may be further configured in a preferred embodiment as: the cable core is formed by the transposition of many copper lines, the week side of cable core wraps up insulating layer and insulating layer in proper order.

By adopting the technical scheme, the heat insulation layer adopts the glass fiber cloth which has excellent physical properties of high temperature resistance, non-combustion, heat insulation, good insulation and the like, and is beneficial to improving the flame retardance and the tensile strength of the cable; the insulating layer adopts aramid yarn, and the cable has the performances of high breaking strength and low breaking elongation, and is favorable for improving the compression resistance effect of the cable core.

The present invention may be further configured in a preferred embodiment as: the buffer sleeve, the buffer strip, the bearing sleeve, the resilience protrusion and the connecting strip are all made of silicon rubber materials added with anti-aging agents.

Through adopting above-mentioned technical scheme, the silicon rubber material has good elasticity, is favorable to realizing buffer sleeve, buffering strip, load cover and resilience arch to the decompression effect of cable core, improves the compressive property of cable.

To sum up, the utility model discloses a following beneficial technological effect:

1. the connecting strips and the buffer strips have elastic buffer effect on the splicing strips, so that the pressure borne by the cable core is favorably reduced, the compression resistance of the cable is improved, and the cable core is favorably prevented from being extruded and cracked;

2. the elastic buffering force of the outer sheath and the buffering bulges is utilized to realize the buffering and pressure reducing effects on the cable;

3. the fire resistance and the insulation performance of the cable are improved by the aid of the flame-resistant layer, the inner sheath and the supporting bar.

Drawings

Fig. 1 is a schematic sectional structure of the present invention.

In the figure, 1, copper wire, 2, insulating layer, 3, insulating layer, 4, support bar, 5, inner sheath, 6, cushion collar, 7, cushion bar, 8, dashpot, 9, resilience arch, 10, bearing sleeve, 11, grafting strip, 12, fire-resistant layer, 13, oversheath, 14, buffering arch, 15, connecting strip.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1, the compression-resistant fire-resistant cable disclosed by the utility model comprises four cable cores, wherein each cable core is formed by twisting seven copper wires 1, and a heat insulation layer 2 and an insulation layer 3 are sequentially wound around the periphery of each cable core; the heat insulation layer 2 is made of glass fiber cloth, and the glass fiber cloth has excellent physical properties such as high temperature resistance, non-combustibility, heat insulation and good insulation, and is beneficial to improving the flame retardance and the tensile strength of the cable; the insulating layer 3 is made of aramid yarns, and has the advantages of high breaking strength and low breaking elongation rate, and the compression resistance effect of the cable core is improved.

Referring to fig. 1, in order to fix the positions of the cable cores, an inner sheath 5 is wound around the periphery of each of the four cable cores, mica powder and elastic ceramic ultrafine powder are contained in the inner sheath 5, a cross-shaped support strip 4 is arranged between every two adjacent cable cores, one side, far away from the inner sheath 5, of an insulating layer 3 on the periphery of each cable core is abutted to the support strip 4, the support strip 4 is fixedly connected with the inner sheath 5, the support strip 4 is made of a halogen-free flame-retardant polyethylene material, and gaps among the inner sheath 5, the cable cores and the support strip 4 are filled with polyethylene particles containing; utilize inner sheath 5 to be fixed in four cable cores respectively between two branches that support bar 4 is adjacent, utilize support bar 4 to make four cable cores mutually independent and rigidity, and inner sheath 5 and support bar 4 all have the insulating effect of fire prevention, are favorable to improving the fire resistance of single cable core.

Referring to fig. 1, in order to improve the compression resistance of the cable core, a buffer sleeve 6 and a force-bearing sleeve 10 are sequentially sleeved on the circumferential side of an inner sheath 5, a plurality of splicing strips 11 are fixedly connected on the inner circumferential side of the force-bearing sleeve 10 at equal intervals, a plurality of buffer strips 7 are fixedly connected on the outer circumferential side of the buffer sleeve 6 at equal intervals, the buffer sleeve 6, the force-bearing sleeve 10, the splicing strips 11 and the buffer strips 7 are made of silicon rubber materials added with anti-aging agents, buffer grooves 8 used for splicing the splicing strips 11 are formed in the buffer strips 7, the side walls of the splicing strips 11 are abutted to the inner side walls of the buffer grooves 8, the area of one ends, close to the buffer grooves 8, of the splicing strips 11 is larger than the area of the bottom wall of the buffer grooves 8, the cross-sectional area of the splicing strips 11 is gradually reduced from the force-bearing sleeve 10 to the buffer strips 7, the ends, facing the buffer grooves 8, rebound bulges 9 are convex arc surfaces, the bottom, the end surface of the rebound bulge 9 close to the insertion strip 11 is a convex cambered surface;

connecting strips 15 for realizing the buffering effect in the circumferential direction of the cable core are arranged between the adjacent splicing strips 11, the connecting strips 15 are made of silicon rubber materials added with anti-aging agents, the connecting strips 15 are V-shaped, the closed ends of the connecting strips 15 are fixedly connected with the buffer sleeves 6, two sides of each connecting strip 15 are respectively and fixedly connected with the two adjacent buffer strips 7 and the splicing strips 11, the outer periphery of the bearing sleeve 10 is coated with an outer sheath 13, the outer peripheral wall of the outer sheath 13 is fixedly connected with a plurality of buffer bulges 14 at equal intervals, the outer sheath 13 and the buffer bulges 14 are made of rubber materials, anti-aging coatings (not shown in the figure) of ultraviolet resistant agents and ozone resistant agents are coated on the outer surfaces of the outer sheath 13 and the buffer bulges 14, an anti-combustion layer 12 is wound between the outer sheath 13 and the bearing sleeve 10, and the anti-combustion layer 12.

Referring to fig. 1, the anti-aging coating is used for preventing the outer sheath 13 from aging, so that the service life of the cable is prolonged, and the flame resistance of the cable is improved by the flame-resistant layer 12; when the cable is extruded, the elastic buffering force of the outer sheath 13 and the buffering bulge 14 is utilized to play a role in buffering and pressure reduction; when bearing cover 10 receives pressure, grafting strip 11 is along the protruding 9 motion of kick-back of inner wall orientation of buffer slot 8, make the one end that grafting strip 11 is close to bearing cover 10 move towards buffer slot 8, grafting strip 11 is favorable to reducing the wearing and tearing of grafting strip 11 for bellied cambered surface towards the one end of buffer slot 8, when grafting strip 11 butt to kick-back are protruding 9, kick-back arch 9 is compressed, make buffer slot 8 move towards the connecting strip 15 at its both ends, buffering strip 7 and grafting strip 11 all make connecting strip 15 by extrusion deformation, utilize the elasticity restoring force of connecting strip 15 and kick-back arch 9, make grafting strip 11 reset, thereby the effectual pressure that has disperseed the cable core and received, the effect that improves the crushing resistance of cable has been realized, prevent that the cable core from being extruded fracture, guarantee the transmission effect of cable to signal and electric power.

The implementation principle of the embodiment is as follows:

when the cable receives the extrusion, oversheath 13 and the protruding 14 effect of realizing buffering decompression of buffering, when bearing cover 10 received pressure, grafting strip 11 kick-backs protruding 9 motion along the inner wall orientation of dashpot 8, the area that grafting strip 11 is close to the one end of dashpot 8 is greater than the diapire area of dashpot 8, make dashpot 8 towards the 15 motions of connecting strip at its both ends, realize the buffering effect to grafting strip 11 through buffering strip 7 and connecting strip 15, grafting strip 11 supports and presses resilience arch 9, utilize the elasticity restoring force of connecting strip 15 and resilience arch 9, make grafting strip 11 reset, thereby the pressure that the cable core received has been reduced.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The utility model provides a fire resisting cable of resistance to compression, includes many cable cores, many the week side cladding of cable core has inner sheath (5), its characterized in that: the periphery of the inner sheath (5) is sequentially sleeved with a buffer sleeve (6) and a bearing sleeve (10), a plurality of inserting strips (11) are fixedly connected to the inner peripheral side of the bearing sleeve (10) at intervals, a plurality of buffer strips (7) are fixedly connected with the outer peripheral side of the buffer sleeve (6) at intervals, the buffer strip (7) is provided with a buffer groove (8) for the insertion of the insertion strip (11), the splicing strips (11) are abutted against the inner side wall of the buffer groove (8), the area of one end of each splicing strip (11) close to the buffer groove (8) is larger than the area of the bottom wall of the buffer groove (8), one end of the inserting strip (11) facing the buffer groove (8) is a convex cambered surface, the bottom wall of buffer slot (8) has set firmly resilience arch (9), resilience arch (9) are close to the terminal surface of grafting strip (11) is bellied cambered surface.

2. The crush-resistant fire-resistant cable of claim 1, wherein: adjacent be provided with between grafting strip (11) in connecting strip (15) of the circumference realization cushioning effect of cable core, connecting strip (15) are the V font, the closed end of connecting strip (15) with cushion collar (6) fixed connection, the both sides of connecting strip (15) are equallyd divide do not with two adjacent buffering strip (7) and grafting strip (11) fixed connection.

3. The crush-resistant fire-resistant cable of claim 2, wherein: the periphery of the bearing sleeve (10) is wrapped by an outer sheath (13), and the peripheral wall of the outer sheath (13) is fixedly provided with a plurality of buffering bulges (14) at equal intervals.

4. The crush-resistant fire-resistant cable of claim 3, wherein: the cross-sectional area of the inserting strips (11) is gradually reduced from the force bearing sleeve (10) to the buffer strips (7).

5. The crush-resistant fire-resistant cable of claim 4, wherein: adjacent two be provided with support bar (4) between the cable core, the cable core is kept away from the week side of inner sheath (5) with support bar (4) butt, support bar (4) with inner sheath (5) fixed connection.

6. The crush-resistant fire-resistant cable of claim 5, wherein: and an anti-combustion layer (12) is wound between the outer sheath (13) and the bearing sleeve (10).

7. The crush-resistant fire-resistant cable of claim 6, wherein: the cable core is formed by transposition of a plurality of copper wires (1), and the periphery of the cable core is wrapped with a heat insulation layer (2) and an insulation layer (3) in sequence.

8. The crush-resistant fire-resistant cable of claim 7, wherein: the buffer sleeve (6), the buffer strip (7), the bearing sleeve (10), the rebound bulge (9) and the connecting strip (15) are all made of silicon rubber materials added with anti-aging agents.